Higher score to filename matches

[viveksjain]

Thanks for this great library, it's really fast!

Summary

Prioritize (either by default or with some option) matches in the filename (i.e. not any of the folders/rest of path).

Additional context

Simple example:

> const zadeh = require('zadeh')
undefined
> zadeh.filter(['foo/bar/baz_qux.js', 'foo/bazqux/a.js'], 'bazqux')
Zadeh: deprecated function. Use 'StringArrayFilterer' instead
[ 'foo/bazqux/a.js', 'foo/bar/baz_qux.js' ]

In my usage, I would generally actually prefer the result for baz_qux.js because I remember and search mostly based on filename.

I do see useExtensionBonus option, couldn't find any clear documentation on what that actually means but it doesn't seem to make any difference.